Question

2x ao quadrado menos 6x = 0

Answer 1

2x^2-6x=0
delta=b^2-4ac
delta=(-6)^2-4.2.0
delta=36-0
delta=36
x=-b-/+ raiz de delta/2a
x=-(-6)-6/2.2
x=6-6/4
x=0/4
x=0
x=-(-6)+6/2.2
x=6+6/4
x=12/4
x=3

Answer 2

Resposta:

$S=\{0,3\}$

Explicação passo-a-passo:

2x² - 6x = 0

a = 2

b = (- 6)

c = 0

$\Delta=b^{2} -4ac\\\Delta=(-6)^{2} -4\times2\times0\\\Delta=36-0\\\Delta=36$

$x=\frac{-b\pm\sqrt{\Delta} }{2a} \\\\x=\frac{-(-6)\pm\sqrt{36} }{2\times2}\\ \\x=\frac{6\pm6}{4}$

$x_{1} =\frac{6+6}{4} =\frac{12}{4} =3\\\\x_{2} =\frac{6-6}{4} =\frac{0}{4} =0$

$S=\{0,3\}$